* {
    margin: 0;
    padding: 0;
}
body{
    background-image: url(../img/bg.png);
    background-repeat: no-repeat;
    background-size: 100% 100%;
    background-attachment: fixed;
}
#title{
    width:100%;
    height: 78px;
    background-color: white;
    padding-left: 120px;
    box-sizing: border-box;
}
#content{
    width:400px;
    height:380px;
    margin: 20px auto;
    border-radius: 20px;
    background-color: white;
    opacity: 0.8;
}
#footer{
    position: absolute;
    bottom: 0;
    left: 0;
    height: 40px;
    width: 100%;
    background-color: lightcyan;
    font-size: 16px;
    text-align: center;
    line-height: 40px;
    font-family: 微软雅黑;
    margin-bottom: 5px;
}